Use a rectangle 12 cm long and 9 cm wide to make a square A. 8B. 6C. 24D. 12

The least common multiple of 12 and 9 is 36. Use a rectangle of 12 cm in length and 9 cm in width to make a square. The minimum side length of the square should be 36 cm. The number of rectangles required to make a square is: (36 △ 12) × (36 △ 9), = 3 × 4, = 12. Therefore, D

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